Bill Clark¹, and Rick Methot^2
1International Pacific Halibut Commission and UW School of Aquatic & Fishery Sciences
²Northwest Fisheries Science Center
February 7, 2011

Current efforts to conserve Pacific salmon (Oncorhynchus spp.) rely on a variety of information sources including empirical observations, expert opinion, and models. I will outline a framework for incorporating detailed information on density-dependent population growth, habitat attributes, hatchery operations, and harvest management into conservation planning in a time-varying, spatially explicit manner. The model relies on a multi-stage Beverton-Holt model to describe the production of salmon from one life stage to the next. We used information from the literature to construct relationships between the physical environment and the necessary productivity and capacity parameters for the model. As an example of how policy makers can use the model in recovery planning, we applied the model to a threatened population of Chinook salmon (O. tshawytscha) in the Snohomish River basin in Puget Sound, Washington, USA. By incorporating additional data on hatchery operations and harvest management for Snohomish River basin stocks, we show how proposed actions to improve physical habitat throughout the basin translate into projected improvements in four important population attributes: abundance, productivity, spatial structure, and life history diversity. I will also describe how to adapt the model to a variety of other management applications.